These wonderful little religious cakes called Patisserie Religieuse in France, are made of choux pastry. They are really just cream puffs, consisting of one larger puff on the bottom with a smaller one on the top. A layer or two of whipped cream in-between the puffs with icing created with the flavor and color of the bakers choice, and strategic drizzling of ganache. They are sometimes described as looking like "plump" nuns!
However, this is home cooking and so we will be forgiven for not being quite as professional as the great chefs, but I can assure you they will be absolutely gorgeous to eat.
The name Religieuse originally came from the violet color of the Cardinal's robes. Today they are often made in pink with rose flavored icing and whip cream filling, chocolate flavored, coffee flavor or anything you like.
If you have seen them in the shops in Paris you will know how gorgeous they are.
You have probably seen eclairs in bake shops and these luscious cream puffs are the same wonderful taste, just dressed differently.